SW-405 I witnessed my sister's friend looking at my erotic book and masturbating! My sister and friends came to visit my house and stayed there. My friend who found an erotic book and got horny couldn't stand it, and he was comforting himself wh

My sister came to my house with a friend and asked me to stay. When I reluctantly consented and slept in the same room, I heard a moving sound and a rough sigh, so when I looked next to me, my sister's friend was masturbating while looking at my treasured erotic book. Witnessed! My friend who got caught approached me and asked me to keep it secret, kissed me and had sex.